* Helper macros.
*/
-#define MUL_UNc(a,b,t) ( (t) = (a) * (b) + ONE_HALF, ( ( ( (t)>>G_SHIFT ) + (t) )>>G_SHIFT ) )
-#define DIV_UNc(a,b) (((comp2_t) (a) * MASK) / (b))
-#define ADD_UNc(x,y,t) ( \
- (t) = x + y, \
- (comp4_t) (comp1_t) ((t) | (0 - ((t) >> G_SHIFT))))
+#define MUL_UNc(a, b, t) \
+ ((t) = (a) * (b) + ONE_HALF, ((((t) >> G_SHIFT ) + (t) ) >> G_SHIFT ))
-#define DIV_ONE_UNc(x) (((x) + ONE_HALF + (((x) + ONE_HALF) >> G_SHIFT)) >> G_SHIFT)
+#define DIV_UNc(a, b) \
+ (((comp2_t) (a) * MASK) / (b))
+
+#define ADD_UNc(x, y, t) \
+ ((t) = x + y, \
+ (comp4_t) (comp1_t) ((t) | (0 - ((t) >> G_SHIFT))))
+
+#define DIV_ONE_UNc(x) \
+ (((x) + ONE_HALF + (((x) + ONE_HALF) >> G_SHIFT)) >> G_SHIFT)
/*
- The methods below use some tricks to be able to do two color
- components at the same time.
-*/
+ * The methods below use some tricks to be able to do two color
+ * components at the same time.
+ */
/*
- x_c = (x_c * a) / 255
-*/
-#define UNcx4_MUL_UNc(x, a) do { \
- comp4_t t = ((x & RB_MASK) * a) + RB_ONE_HALF; \
- t = (t + ((t >> COMPONENT_SIZE) & RB_MASK)) >> COMPONENT_SIZE; \
- t &= RB_MASK; \
- \
- x = (((x >> COMPONENT_SIZE) & RB_MASK) * a) + RB_ONE_HALF; \
- x = (x + ((x >> COMPONENT_SIZE) & RB_MASK)); \
- x &= RB_MASK << COMPONENT_SIZE; \
- x += t; \
+ * x_c = (x_c * a) / 255
+ */
+#define UNcx4_MUL_UNc(x, a) \
+ do \
+ { \
+ comp4_t t = ((x & RB_MASK) * a) + RB_ONE_HALF; \
+ t = (t + ((t >> COMPONENT_SIZE) & RB_MASK)) >> COMPONENT_SIZE; \
+ t &= RB_MASK; \
+ \
+ x = (((x >> COMPONENT_SIZE) & RB_MASK) * a) + RB_ONE_HALF; \
+ x = (x + ((x >> COMPONENT_SIZE) & RB_MASK)); \
+ x &= RB_MASK << COMPONENT_SIZE; \
+ x += t; \
} while (0)
/*
- x_c = (x_c * a) / 255 + y_c
-*/
-#define UNcx4_MUL_UNc_ADD_UNcx4(x, a, y) do { \
- /* multiply and divide: trunc((i + 128)*257/65536) */ \
- comp4_t t = ((x & RB_MASK) * a) + RB_ONE_HALF; \
- t = (t + ((t >> COMPONENT_SIZE) & RB_MASK)) >> COMPONENT_SIZE; \
- t &= RB_MASK; \
- \
- /* add */ \
- t += y & RB_MASK; \
- \
- /* saturate */ \
- t |= RB_MASK_PLUS_ONE - ((t >> COMPONENT_SIZE) & RB_MASK); \
- t &= RB_MASK; \
- \
- /* multiply and divide */ \
- x = (((x >> COMPONENT_SIZE) & RB_MASK) * a) + RB_ONE_HALF; \
- x = (x + ((x >> COMPONENT_SIZE) & RB_MASK)) >> COMPONENT_SIZE; \
- x &= RB_MASK; \
- \
- /* add */ \
- x += (y >> COMPONENT_SIZE) & RB_MASK; \
- \
- /* saturate */ \
- x |= RB_MASK_PLUS_ONE - ((x >> COMPONENT_SIZE) & RB_MASK); \
- x &= RB_MASK; \
- \
- /* recombine */ \
- x <<= COMPONENT_SIZE; \
- x += t; \
+ * x_c = (x_c * a) / 255 + y_c
+ */
+#define UNcx4_MUL_UNc_ADD_UNcx4(x, a, y) \
+ do \
+ { \
+ /* multiply and divide: trunc((i + 128)*257/65536) */ \
+ comp4_t t = ((x & RB_MASK) * a) + RB_ONE_HALF; \
+ t = (t + ((t >> COMPONENT_SIZE) & RB_MASK)) >> COMPONENT_SIZE; \
+ t &= RB_MASK; \
+ \
+ /* add */ \
+ t += y & RB_MASK; \
+ \
+ /* saturate */ \
+ t |= RB_MASK_PLUS_ONE - ((t >> COMPONENT_SIZE) & RB_MASK); \
+ t &= RB_MASK; \
+ \
+ /* multiply and divide */ \
+ x = (((x >> COMPONENT_SIZE) & RB_MASK) * a) + RB_ONE_HALF; \
+ x = (x + ((x >> COMPONENT_SIZE) & RB_MASK)) >> COMPONENT_SIZE; \
+ x &= RB_MASK; \
+ \
+ /* add */ \
+ x += (y >> COMPONENT_SIZE) & RB_MASK; \
+ \
+ /* saturate */ \
+ x |= RB_MASK_PLUS_ONE - ((x >> COMPONENT_SIZE) & RB_MASK); \
+ x &= RB_MASK; \
+ \
+ /* recombine */ \
+ x <<= COMPONENT_SIZE; \
+ x += t; \
} while (0)
/*
- x_c = (x_c * a + y_c * b) / 255
-*/
-#define UNcx4_MUL_UNc_ADD_UNcx4_MUL_UNc(x, a, y, b) do { \
- comp4_t t; \
- comp4_t r = (x >> A_SHIFT) * a + (y >> A_SHIFT) * b + ONE_HALF; \
- r += (r >> G_SHIFT); \
- r >>= G_SHIFT; \
- \
- t = (x & G_MASK) * a + (y & G_MASK) * b; \
- t += (t >> G_SHIFT) + (ONE_HALF << G_SHIFT); \
- t >>= R_SHIFT; \
- \
- t |= r << R_SHIFT; \
- t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \
- t &= RB_MASK; \
- t <<= G_SHIFT; \
- \
- r = ((x >> R_SHIFT) & MASK) * a + \
- ((y >> R_SHIFT) & MASK) * b + ONE_HALF; \
- r += (r >> G_SHIFT); \
- r >>= G_SHIFT; \
- \
- x = (x & MASK) * a + (y & MASK) * b + ONE_HALF; \
- x += (x >> G_SHIFT); \
- x >>= G_SHIFT; \
- x |= r << R_SHIFT; \
- x |= RB_MASK_PLUS_ONE - ((x >> G_SHIFT) & RB_MASK); \
- x &= RB_MASK; \
- x |= t; \
+ * x_c = (x_c * a + y_c * b) / 255
+ */
+#define UNcx4_MUL_UNc_ADD_UNcx4_MUL_UNc(x, a, y, b) \
+ do \
+ { \
+ comp4_t t; \
+ comp4_t r = (x >> A_SHIFT) * a + (y >> A_SHIFT) * b + ONE_HALF; \
+ r += (r >> G_SHIFT); \
+ r >>= G_SHIFT; \
+ \
+ t = (x & G_MASK) * a + (y & G_MASK) * b; \
+ t += (t >> G_SHIFT) + (ONE_HALF << G_SHIFT); \
+ t >>= R_SHIFT; \
+ \
+ t |= r << R_SHIFT; \
+ t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \
+ t &= RB_MASK; \
+ t <<= G_SHIFT; \
+ \
+ r = ((x >> R_SHIFT) & MASK) * a + \
+ ((y >> R_SHIFT) & MASK) * b + ONE_HALF; \
+ r += (r >> G_SHIFT); \
+ r >>= G_SHIFT; \
+ \
+ x = (x & MASK) * a + (y & MASK) * b + ONE_HALF; \
+ x += (x >> G_SHIFT); \
+ x >>= G_SHIFT; \
+ x |= r << R_SHIFT; \
+ x |= RB_MASK_PLUS_ONE - ((x >> G_SHIFT) & RB_MASK); \
+ x &= RB_MASK; \
+ x |= t; \
} while (0)
/*
- x_c = (x_c * a_c) / 255
-*/
-#define UNcx4_MUL_UNcx4(x, a) do { \
- comp4_t t; \
- comp4_t r = (x & MASK) * (a & MASK); \
- r |= (x & R_MASK) * ((a >> R_SHIFT) & MASK); \
- r += RB_ONE_HALF; \
- r = (r + ((r >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \
- r &= RB_MASK; \
- \
- x >>= G_SHIFT; \
- t = (x & MASK) * ((a >> G_SHIFT) & MASK); \
- t |= (x & R_MASK) * (a >> A_SHIFT); \
- t += RB_ONE_HALF; \
- t = t + ((t >> G_SHIFT) & RB_MASK); \
- x = r | (t & AG_MASK); \
+ * x_c = (x_c * a_c) / 255
+ */
+#define UNcx4_MUL_UNcx4(x, a) \
+ do \
+ { \
+ comp4_t t; \
+ comp4_t r = (x & MASK) * (a & MASK); \
+ r |= (x & R_MASK) * ((a >> R_SHIFT) & MASK); \
+ r += RB_ONE_HALF; \
+ r = (r + ((r >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \
+ r &= RB_MASK; \
+ \
+ x >>= G_SHIFT; \
+ t = (x & MASK) * ((a >> G_SHIFT) & MASK); \
+ t |= (x & R_MASK) * (a >> A_SHIFT); \
+ t += RB_ONE_HALF; \
+ t = t + ((t >> G_SHIFT) & RB_MASK); \
+ x = r | (t & AG_MASK); \
} while (0)
/*
- x_c = (x_c * a_c) / 255 + y_c
-*/
-#define UNcx4_MUL_UNcx4_ADD_UNcx4(x, a, y) do { \
- comp4_t t; \
- comp4_t r = (x & MASK) * (a & MASK); \
- r |= (x & R_MASK) * ((a >> R_SHIFT) & MASK); \
- r += RB_ONE_HALF; \
- r = (r + ((r >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \
- r &= RB_MASK; \
- r += y & RB_MASK; \
- r |= RB_MASK_PLUS_ONE - ((r >> G_SHIFT) & RB_MASK); \
- r &= RB_MASK; \
- \
- x >>= G_SHIFT; \
- t = (x & MASK) * ((a >> G_SHIFT) & MASK); \
- t |= (x & R_MASK) * (a >> A_SHIFT); \
- t += RB_ONE_HALF; \
- t = (t + ((t >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \
- t &= RB_MASK; \
- t += (y >> G_SHIFT) & RB_MASK; \
- t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \
- t &= RB_MASK; \
- x = r | (t << G_SHIFT); \
+ * x_c = (x_c * a_c) / 255 + y_c
+ */
+#define UNcx4_MUL_UNcx4_ADD_UNcx4(x, a, y) \
+ do \
+ { \
+ comp4_t t; \
+ comp4_t r = (x & MASK) * (a & MASK); \
+ r |= (x & R_MASK) * ((a >> R_SHIFT) & MASK); \
+ r += RB_ONE_HALF; \
+ r = (r + ((r >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \
+ r &= RB_MASK; \
+ r += y & RB_MASK; \
+ r |= RB_MASK_PLUS_ONE - ((r >> G_SHIFT) & RB_MASK); \
+ r &= RB_MASK; \
+ \
+ x >>= G_SHIFT; \
+ t = (x & MASK) * ((a >> G_SHIFT) & MASK); \
+ t |= (x & R_MASK) * (a >> A_SHIFT); \
+ t += RB_ONE_HALF; \
+ t = (t + ((t >> G_SHIFT) & RB_MASK)) >> G_SHIFT; \
+ t &= RB_MASK; \
+ t += (y >> G_SHIFT) & RB_MASK; \
+ t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \
+ t &= RB_MASK; \
+ x = r | (t << G_SHIFT); \
} while (0)
/*
- x_c = (x_c * a_c + y_c * b) / 255
-*/
-#define UNcx4_MUL_UNcx4_ADD_UNcx4_MUL_UNc(x, a, y, b) do { \
- comp4_t t; \
- comp4_t r = (x >> A_SHIFT) * (a >> A_SHIFT) + \
- (y >> A_SHIFT) * b; \
- r += (r >> G_SHIFT) + ONE_HALF; \
- r >>= G_SHIFT; \
- \
- t = (x & G_MASK) * ((a >> G_SHIFT) & MASK) + (y & G_MASK) * b; \
- t += (t >> G_SHIFT) + (ONE_HALF << G_SHIFT); \
- t >>= R_SHIFT; \
- \
- t |= r << R_SHIFT; \
- t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \
- t &= RB_MASK; \
- t <<= G_SHIFT; \
- \
- r = ((x >> R_SHIFT) & MASK) * ((a >> R_SHIFT) & MASK) + \
- ((y >> R_SHIFT) & MASK) * b + ONE_HALF; \
- r += (r >> G_SHIFT); \
- r >>= G_SHIFT; \
- \
- x = (x & MASK) * (a & MASK) + (y & MASK) * b + ONE_HALF; \
- x += (x >> G_SHIFT); \
- x >>= G_SHIFT; \
- x |= r << R_SHIFT; \
- x |= RB_MASK_PLUS_ONE - ((x >> G_SHIFT) & RB_MASK); \
- x &= RB_MASK; \
- x |= t; \
+ * x_c = (x_c * a_c + y_c * b) / 255
+ */
+#define UNcx4_MUL_UNcx4_ADD_UNcx4_MUL_UNc(x, a, y, b) \
+ do \
+ { \
+ comp4_t t; \
+ comp4_t r = (x >> A_SHIFT) * (a >> A_SHIFT) + \
+ (y >> A_SHIFT) * b; \
+ r += (r >> G_SHIFT) + ONE_HALF; \
+ r >>= G_SHIFT; \
+ \
+ t = (x & G_MASK) * ((a >> G_SHIFT) & MASK) + (y & G_MASK) * b; \
+ t += (t >> G_SHIFT) + (ONE_HALF << G_SHIFT); \
+ t >>= R_SHIFT; \
+ \
+ t |= r << R_SHIFT; \
+ t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \
+ t &= RB_MASK; \
+ t <<= G_SHIFT; \
+ \
+ r = ((x >> R_SHIFT) & MASK) * ((a >> R_SHIFT) & MASK) + \
+ ((y >> R_SHIFT) & MASK) * b + ONE_HALF; \
+ r += (r >> G_SHIFT); \
+ r >>= G_SHIFT; \
+ \
+ x = (x & MASK) * (a & MASK) + (y & MASK) * b + ONE_HALF; \
+ x += (x >> G_SHIFT); \
+ x >>= G_SHIFT; \
+ x |= r << R_SHIFT; \
+ x |= RB_MASK_PLUS_ONE - ((x >> G_SHIFT) & RB_MASK); \
+ x &= RB_MASK; \
+ x |= t; \
} while (0)
/*
- x_c = min(x_c + y_c, 255)
-*/
-#define UNcx4_ADD_UNcx4(x, y) do { \
- comp4_t t; \
- comp4_t r = (x & RB_MASK) + (y & RB_MASK); \
- r |= RB_MASK_PLUS_ONE - ((r >> G_SHIFT) & RB_MASK); \
- r &= RB_MASK; \
- \
- t = ((x >> G_SHIFT) & RB_MASK) + ((y >> G_SHIFT) & RB_MASK); \
- t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \
- r |= (t & RB_MASK) << G_SHIFT; \
- x = r; \
+ x_c = min(x_c + y_c, 255)
+ */
+#define UNcx4_ADD_UNcx4(x, y) \
+ do \
+ { \
+ comp4_t t; \
+ comp4_t r = (x & RB_MASK) + (y & RB_MASK); \
+ r |= RB_MASK_PLUS_ONE - ((r >> G_SHIFT) & RB_MASK); \
+ r &= RB_MASK; \
+ \
+ t = ((x >> G_SHIFT) & RB_MASK) + ((y >> G_SHIFT) & RB_MASK); \
+ t |= RB_MASK_PLUS_ONE - ((t >> G_SHIFT) & RB_MASK); \
+ r |= (t & RB_MASK) << G_SHIFT; \
+ x = r; \
} while (0)
-
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